1 // SPDX-License-Identifier: GPL-2.0-only
3 * Module for pnfs flexfile layout driver.
5 * Copyright (c) 2014, Primary Data, Inc. All rights reserved.
7 * Tao Peng <bergwolf@primarydata.com>
10 #include <linux/nfs_fs.h>
11 #include <linux/nfs_mount.h>
12 #include <linux/nfs_page.h>
13 #include <linux/module.h>
14 #include <linux/sched/mm.h>
16 #include <linux/sunrpc/metrics.h>
18 #include "flexfilelayout.h"
19 #include "../nfs4session.h"
20 #include "../nfs4idmap.h"
21 #include "../internal.h"
22 #include "../delegation.h"
23 #include "../nfs4trace.h"
24 #include "../iostat.h"
28 #define NFSDBG_FACILITY NFSDBG_PNFS_LD
30 #define FF_LAYOUT_POLL_RETRY_MAX (15*HZ)
31 #define FF_LAYOUTRETURN_MAXERR 20
33 static unsigned short io_maxretrans;
35 static const struct pnfs_commit_ops ff_layout_commit_ops;
36 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
37 struct nfs_pgio_header *hdr);
38 static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
39 struct nfs42_layoutstat_devinfo *devinfo,
41 static void ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
42 const struct nfs42_layoutstat_devinfo *devinfo,
43 struct nfs4_ff_layout_mirror *mirror);
45 static struct pnfs_layout_hdr *
46 ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
48 struct nfs4_flexfile_layout *ffl;
50 ffl = kzalloc(sizeof(*ffl), gfp_flags);
52 pnfs_init_ds_commit_info(&ffl->commit_info);
53 INIT_LIST_HEAD(&ffl->error_list);
54 INIT_LIST_HEAD(&ffl->mirrors);
55 ffl->last_report_time = ktime_get();
56 ffl->commit_info.ops = &ff_layout_commit_ops;
57 return &ffl->generic_hdr;
63 ff_layout_free_layout_hdr(struct pnfs_layout_hdr *lo)
65 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(lo);
66 struct nfs4_ff_layout_ds_err *err, *n;
68 list_for_each_entry_safe(err, n, &ffl->error_list, list) {
72 kfree_rcu(ffl, generic_hdr.plh_rcu);
75 static int decode_pnfs_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
79 p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
80 if (unlikely(p == NULL))
82 stateid->type = NFS4_PNFS_DS_STATEID_TYPE;
83 memcpy(stateid->data, p, NFS4_STATEID_SIZE);
84 dprintk("%s: stateid id= [%x%x%x%x]\n", __func__,
85 p[0], p[1], p[2], p[3]);
89 static int decode_deviceid(struct xdr_stream *xdr, struct nfs4_deviceid *devid)
93 p = xdr_inline_decode(xdr, NFS4_DEVICEID4_SIZE);
96 memcpy(devid, p, NFS4_DEVICEID4_SIZE);
97 nfs4_print_deviceid(devid);
101 static int decode_nfs_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
105 p = xdr_inline_decode(xdr, 4);
108 fh->size = be32_to_cpup(p++);
109 if (fh->size > sizeof(struct nfs_fh)) {
110 printk(KERN_ERR "NFS flexfiles: Too big fh received %d\n",
115 p = xdr_inline_decode(xdr, fh->size);
118 memcpy(&fh->data, p, fh->size);
119 dprintk("%s: fh len %d\n", __func__, fh->size);
125 * Currently only stringified uids and gids are accepted.
126 * I.e., kerberos is not supported to the DSes, so no pricipals.
128 * That means that one common function will suffice, but when
129 * principals are added, this should be split to accomodate
130 * calls to both nfs_map_name_to_uid() and nfs_map_group_to_gid().
133 decode_name(struct xdr_stream *xdr, u32 *id)
138 /* opaque_length(4)*/
139 p = xdr_inline_decode(xdr, 4);
142 len = be32_to_cpup(p++);
146 dprintk("%s: len %u\n", __func__, len);
149 p = xdr_inline_decode(xdr, len);
153 if (!nfs_map_string_to_numeric((char *)p, len, id))
159 static bool ff_mirror_match_fh(const struct nfs4_ff_layout_mirror *m1,
160 const struct nfs4_ff_layout_mirror *m2)
164 if (m1->fh_versions_cnt != m2->fh_versions_cnt)
166 for (i = 0; i < m1->fh_versions_cnt; i++) {
167 bool found_fh = false;
168 for (j = 0; j < m2->fh_versions_cnt; j++) {
169 if (nfs_compare_fh(&m1->fh_versions[i],
170 &m2->fh_versions[j]) == 0) {
181 static struct nfs4_ff_layout_mirror *
182 ff_layout_add_mirror(struct pnfs_layout_hdr *lo,
183 struct nfs4_ff_layout_mirror *mirror)
185 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
186 struct nfs4_ff_layout_mirror *pos;
187 struct inode *inode = lo->plh_inode;
189 spin_lock(&inode->i_lock);
190 list_for_each_entry(pos, &ff_layout->mirrors, mirrors) {
191 if (memcmp(&mirror->devid, &pos->devid, sizeof(pos->devid)) != 0)
193 if (!ff_mirror_match_fh(mirror, pos))
195 if (refcount_inc_not_zero(&pos->ref)) {
196 spin_unlock(&inode->i_lock);
200 list_add(&mirror->mirrors, &ff_layout->mirrors);
202 spin_unlock(&inode->i_lock);
207 ff_layout_remove_mirror(struct nfs4_ff_layout_mirror *mirror)
210 if (mirror->layout == NULL)
212 inode = mirror->layout->plh_inode;
213 spin_lock(&inode->i_lock);
214 list_del(&mirror->mirrors);
215 spin_unlock(&inode->i_lock);
216 mirror->layout = NULL;
219 static struct nfs4_ff_layout_mirror *ff_layout_alloc_mirror(gfp_t gfp_flags)
221 struct nfs4_ff_layout_mirror *mirror;
223 mirror = kzalloc(sizeof(*mirror), gfp_flags);
224 if (mirror != NULL) {
225 spin_lock_init(&mirror->lock);
226 refcount_set(&mirror->ref, 1);
227 INIT_LIST_HEAD(&mirror->mirrors);
232 static void ff_layout_free_mirror(struct nfs4_ff_layout_mirror *mirror)
234 const struct cred *cred;
236 ff_layout_remove_mirror(mirror);
237 kfree(mirror->fh_versions);
238 cred = rcu_access_pointer(mirror->ro_cred);
240 cred = rcu_access_pointer(mirror->rw_cred);
242 nfs4_ff_layout_put_deviceid(mirror->mirror_ds);
246 static void ff_layout_put_mirror(struct nfs4_ff_layout_mirror *mirror)
248 if (mirror != NULL && refcount_dec_and_test(&mirror->ref))
249 ff_layout_free_mirror(mirror);
252 static void ff_layout_free_mirror_array(struct nfs4_ff_layout_segment *fls)
256 for (i = 0; i < fls->mirror_array_cnt; i++)
257 ff_layout_put_mirror(fls->mirror_array[i]);
260 static void _ff_layout_free_lseg(struct nfs4_ff_layout_segment *fls)
263 ff_layout_free_mirror_array(fls);
269 ff_lseg_match_mirrors(struct pnfs_layout_segment *l1,
270 struct pnfs_layout_segment *l2)
272 const struct nfs4_ff_layout_segment *fl1 = FF_LAYOUT_LSEG(l1);
273 const struct nfs4_ff_layout_segment *fl2 = FF_LAYOUT_LSEG(l1);
276 if (fl1->mirror_array_cnt != fl2->mirror_array_cnt)
278 for (i = 0; i < fl1->mirror_array_cnt; i++) {
279 if (fl1->mirror_array[i] != fl2->mirror_array[i])
286 ff_lseg_range_is_after(const struct pnfs_layout_range *l1,
287 const struct pnfs_layout_range *l2)
291 if (l1->iomode != l2->iomode)
292 return l1->iomode != IOMODE_READ;
293 end1 = pnfs_calc_offset_end(l1->offset, l1->length);
294 end2 = pnfs_calc_offset_end(l2->offset, l2->length);
295 if (end1 < l2->offset)
297 if (end2 < l1->offset)
299 return l2->offset <= l1->offset;
303 ff_lseg_merge(struct pnfs_layout_segment *new,
304 struct pnfs_layout_segment *old)
306 u64 new_end, old_end;
308 if (test_bit(NFS_LSEG_LAYOUTRETURN, &old->pls_flags))
310 if (new->pls_range.iomode != old->pls_range.iomode)
312 old_end = pnfs_calc_offset_end(old->pls_range.offset,
313 old->pls_range.length);
314 if (old_end < new->pls_range.offset)
316 new_end = pnfs_calc_offset_end(new->pls_range.offset,
317 new->pls_range.length);
318 if (new_end < old->pls_range.offset)
320 if (!ff_lseg_match_mirrors(new, old))
323 /* Mergeable: copy info from 'old' to 'new' */
324 if (new_end < old_end)
326 if (new->pls_range.offset < old->pls_range.offset)
327 new->pls_range.offset = old->pls_range.offset;
328 new->pls_range.length = pnfs_calc_offset_length(new->pls_range.offset,
330 if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
331 set_bit(NFS_LSEG_ROC, &new->pls_flags);
336 ff_layout_add_lseg(struct pnfs_layout_hdr *lo,
337 struct pnfs_layout_segment *lseg,
338 struct list_head *free_me)
340 pnfs_generic_layout_insert_lseg(lo, lseg,
341 ff_lseg_range_is_after,
346 static void ff_layout_sort_mirrors(struct nfs4_ff_layout_segment *fls)
350 for (i = 0; i < fls->mirror_array_cnt - 1; i++) {
351 for (j = i + 1; j < fls->mirror_array_cnt; j++)
352 if (fls->mirror_array[i]->efficiency <
353 fls->mirror_array[j]->efficiency)
354 swap(fls->mirror_array[i],
355 fls->mirror_array[j]);
359 static struct pnfs_layout_segment *
360 ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
361 struct nfs4_layoutget_res *lgr,
364 struct pnfs_layout_segment *ret;
365 struct nfs4_ff_layout_segment *fls = NULL;
366 struct xdr_stream stream;
368 struct page *scratch;
370 u32 mirror_array_cnt;
374 dprintk("--> %s\n", __func__);
375 scratch = alloc_page(gfp_flags);
377 return ERR_PTR(-ENOMEM);
379 xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
381 xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
383 /* stripe unit and mirror_array_cnt */
385 p = xdr_inline_decode(&stream, 8 + 4);
389 p = xdr_decode_hyper(p, &stripe_unit);
390 mirror_array_cnt = be32_to_cpup(p++);
391 dprintk("%s: stripe_unit=%llu mirror_array_cnt=%u\n", __func__,
392 stripe_unit, mirror_array_cnt);
394 if (mirror_array_cnt > NFS4_FLEXFILE_LAYOUT_MAX_MIRROR_CNT ||
395 mirror_array_cnt == 0)
399 fls = kzalloc(struct_size(fls, mirror_array, mirror_array_cnt),
404 fls->mirror_array_cnt = mirror_array_cnt;
405 fls->stripe_unit = stripe_unit;
407 for (i = 0; i < fls->mirror_array_cnt; i++) {
408 struct nfs4_ff_layout_mirror *mirror;
410 const struct cred __rcu *cred;
413 u32 ds_count, fh_count, id;
417 p = xdr_inline_decode(&stream, 4);
420 ds_count = be32_to_cpup(p);
422 /* FIXME: allow for striping? */
426 fls->mirror_array[i] = ff_layout_alloc_mirror(gfp_flags);
427 if (fls->mirror_array[i] == NULL) {
432 fls->mirror_array[i]->ds_count = ds_count;
435 rc = decode_deviceid(&stream, &fls->mirror_array[i]->devid);
441 p = xdr_inline_decode(&stream, 4);
444 fls->mirror_array[i]->efficiency = be32_to_cpup(p);
447 rc = decode_pnfs_stateid(&stream, &fls->mirror_array[i]->stateid);
453 p = xdr_inline_decode(&stream, 4);
456 fh_count = be32_to_cpup(p);
458 fls->mirror_array[i]->fh_versions =
459 kcalloc(fh_count, sizeof(struct nfs_fh),
461 if (fls->mirror_array[i]->fh_versions == NULL) {
466 for (j = 0; j < fh_count; j++) {
467 rc = decode_nfs_fh(&stream,
468 &fls->mirror_array[i]->fh_versions[j]);
473 fls->mirror_array[i]->fh_versions_cnt = fh_count;
476 rc = decode_name(&stream, &id);
480 uid = make_kuid(&init_user_ns, id);
483 rc = decode_name(&stream, &id);
487 gid = make_kgid(&init_user_ns, id);
489 if (gfp_flags & __GFP_FS)
490 kcred = prepare_kernel_cred(NULL);
492 unsigned int nofs_flags = memalloc_nofs_save();
493 kcred = prepare_kernel_cred(NULL);
494 memalloc_nofs_restore(nofs_flags);
501 cred = RCU_INITIALIZER(kcred);
503 if (lgr->range.iomode == IOMODE_READ)
504 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
506 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
508 mirror = ff_layout_add_mirror(lh, fls->mirror_array[i]);
509 if (mirror != fls->mirror_array[i]) {
510 /* swap cred ptrs so free_mirror will clean up old */
511 if (lgr->range.iomode == IOMODE_READ) {
512 cred = xchg(&mirror->ro_cred, cred);
513 rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
515 cred = xchg(&mirror->rw_cred, cred);
516 rcu_assign_pointer(fls->mirror_array[i]->rw_cred, cred);
518 ff_layout_free_mirror(fls->mirror_array[i]);
519 fls->mirror_array[i] = mirror;
522 dprintk("%s: iomode %s uid %u gid %u\n", __func__,
523 lgr->range.iomode == IOMODE_READ ? "READ" : "RW",
524 from_kuid(&init_user_ns, uid),
525 from_kgid(&init_user_ns, gid));
528 p = xdr_inline_decode(&stream, 4);
530 goto out_sort_mirrors;
531 fls->flags = be32_to_cpup(p);
533 p = xdr_inline_decode(&stream, 4);
535 goto out_sort_mirrors;
536 for (i=0; i < fls->mirror_array_cnt; i++)
537 fls->mirror_array[i]->report_interval = be32_to_cpup(p);
540 ff_layout_sort_mirrors(fls);
541 ret = &fls->generic_hdr;
542 dprintk("<-- %s (success)\n", __func__);
544 __free_page(scratch);
547 _ff_layout_free_lseg(fls);
549 dprintk("<-- %s (%d)\n", __func__, rc);
554 ff_layout_free_lseg(struct pnfs_layout_segment *lseg)
556 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
558 dprintk("--> %s\n", __func__);
560 if (lseg->pls_range.iomode == IOMODE_RW) {
561 struct nfs4_flexfile_layout *ffl;
564 ffl = FF_LAYOUT_FROM_HDR(lseg->pls_layout);
565 inode = ffl->generic_hdr.plh_inode;
566 spin_lock(&inode->i_lock);
567 pnfs_generic_ds_cinfo_release_lseg(&ffl->commit_info, lseg);
568 spin_unlock(&inode->i_lock);
570 _ff_layout_free_lseg(fls);
574 nfs4_ff_start_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
576 /* first IO request? */
577 if (atomic_inc_return(&timer->n_ops) == 1) {
578 timer->start_time = now;
583 nfs4_ff_end_busy_timer(struct nfs4_ff_busy_timer *timer, ktime_t now)
587 if (atomic_dec_return(&timer->n_ops) < 0)
590 start = timer->start_time;
591 timer->start_time = now;
592 return ktime_sub(now, start);
596 nfs4_ff_layoutstat_start_io(struct nfs4_ff_layout_mirror *mirror,
597 struct nfs4_ff_layoutstat *layoutstat,
600 s64 report_interval = FF_LAYOUTSTATS_REPORT_INTERVAL;
601 struct nfs4_flexfile_layout *ffl = FF_LAYOUT_FROM_HDR(mirror->layout);
603 nfs4_ff_start_busy_timer(&layoutstat->busy_timer, now);
604 if (!mirror->start_time)
605 mirror->start_time = now;
606 if (mirror->report_interval != 0)
607 report_interval = (s64)mirror->report_interval * 1000LL;
608 else if (layoutstats_timer != 0)
609 report_interval = (s64)layoutstats_timer * 1000LL;
610 if (ktime_to_ms(ktime_sub(now, ffl->last_report_time)) >=
612 ffl->last_report_time = now;
620 nfs4_ff_layout_stat_io_update_requested(struct nfs4_ff_layoutstat *layoutstat,
623 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
625 iostat->ops_requested++;
626 iostat->bytes_requested += requested;
630 nfs4_ff_layout_stat_io_update_completed(struct nfs4_ff_layoutstat *layoutstat,
633 ktime_t time_completed,
634 ktime_t time_started)
636 struct nfs4_ff_io_stat *iostat = &layoutstat->io_stat;
637 ktime_t completion_time = ktime_sub(time_completed, time_started);
640 iostat->ops_completed++;
641 iostat->bytes_completed += completed;
642 iostat->bytes_not_delivered += requested - completed;
644 timer = nfs4_ff_end_busy_timer(&layoutstat->busy_timer, time_completed);
645 iostat->total_busy_time =
646 ktime_add(iostat->total_busy_time, timer);
647 iostat->aggregate_completion_time =
648 ktime_add(iostat->aggregate_completion_time,
653 nfs4_ff_layout_stat_io_start_read(struct inode *inode,
654 struct nfs4_ff_layout_mirror *mirror,
655 __u64 requested, ktime_t now)
659 spin_lock(&mirror->lock);
660 report = nfs4_ff_layoutstat_start_io(mirror, &mirror->read_stat, now);
661 nfs4_ff_layout_stat_io_update_requested(&mirror->read_stat, requested);
662 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
663 spin_unlock(&mirror->lock);
666 pnfs_report_layoutstat(inode, GFP_KERNEL);
670 nfs4_ff_layout_stat_io_end_read(struct rpc_task *task,
671 struct nfs4_ff_layout_mirror *mirror,
675 spin_lock(&mirror->lock);
676 nfs4_ff_layout_stat_io_update_completed(&mirror->read_stat,
677 requested, completed,
678 ktime_get(), task->tk_start);
679 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
680 spin_unlock(&mirror->lock);
684 nfs4_ff_layout_stat_io_start_write(struct inode *inode,
685 struct nfs4_ff_layout_mirror *mirror,
686 __u64 requested, ktime_t now)
690 spin_lock(&mirror->lock);
691 report = nfs4_ff_layoutstat_start_io(mirror , &mirror->write_stat, now);
692 nfs4_ff_layout_stat_io_update_requested(&mirror->write_stat, requested);
693 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
694 spin_unlock(&mirror->lock);
697 pnfs_report_layoutstat(inode, GFP_NOIO);
701 nfs4_ff_layout_stat_io_end_write(struct rpc_task *task,
702 struct nfs4_ff_layout_mirror *mirror,
705 enum nfs3_stable_how committed)
707 if (committed == NFS_UNSTABLE)
708 requested = completed = 0;
710 spin_lock(&mirror->lock);
711 nfs4_ff_layout_stat_io_update_completed(&mirror->write_stat,
712 requested, completed, ktime_get(), task->tk_start);
713 set_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags);
714 spin_unlock(&mirror->lock);
718 ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, int idx)
720 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
723 nfs4_mark_deviceid_unavailable(devid);
727 ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, int idx)
729 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
732 nfs4_mark_deviceid_available(devid);
735 static struct nfs4_pnfs_ds *
736 ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg,
737 int start_idx, int *best_idx,
740 struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
741 struct nfs4_ff_layout_mirror *mirror;
742 struct nfs4_pnfs_ds *ds;
743 bool fail_return = false;
746 /* mirrors are initially sorted by efficiency */
747 for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
748 if (idx+1 == fls->mirror_array_cnt)
749 fail_return = !check_device;
751 mirror = FF_LAYOUT_COMP(lseg, idx);
752 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, fail_return);
757 nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
767 static struct nfs4_pnfs_ds *
768 ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
769 int start_idx, int *best_idx)
771 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
774 static struct nfs4_pnfs_ds *
775 ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
776 int start_idx, int *best_idx)
778 return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
781 static struct nfs4_pnfs_ds *
782 ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
783 int start_idx, int *best_idx)
785 struct nfs4_pnfs_ds *ds;
787 ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
790 return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
793 static struct nfs4_pnfs_ds *
794 ff_layout_get_ds_for_read(struct nfs_pageio_descriptor *pgio, int *best_idx)
796 struct pnfs_layout_segment *lseg = pgio->pg_lseg;
797 struct nfs4_pnfs_ds *ds;
799 ds = ff_layout_choose_best_ds_for_read(lseg, pgio->pg_mirror_idx,
801 if (ds || !pgio->pg_mirror_idx)
803 return ff_layout_choose_best_ds_for_read(lseg, 0, best_idx);
807 ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
808 struct nfs_page *req,
811 pnfs_put_lseg(pgio->pg_lseg);
812 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
813 nfs_req_openctx(req),
819 if (IS_ERR(pgio->pg_lseg)) {
820 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
821 pgio->pg_lseg = NULL;
826 ff_layout_pg_check_layout(struct nfs_pageio_descriptor *pgio,
827 struct nfs_page *req)
829 pnfs_generic_pg_check_layout(pgio);
830 pnfs_generic_pg_check_range(pgio, req);
834 ff_layout_pg_init_read(struct nfs_pageio_descriptor *pgio,
835 struct nfs_page *req)
837 struct nfs_pgio_mirror *pgm;
838 struct nfs4_ff_layout_mirror *mirror;
839 struct nfs4_pnfs_ds *ds;
843 ff_layout_pg_check_layout(pgio, req);
844 /* Use full layout for now */
845 if (!pgio->pg_lseg) {
846 ff_layout_pg_get_read(pgio, req, false);
850 if (ff_layout_avoid_read_on_rw(pgio->pg_lseg)) {
851 ff_layout_pg_get_read(pgio, req, true);
856 ds = ff_layout_get_ds_for_read(pgio, &ds_idx);
858 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
860 pnfs_generic_pg_cleanup(pgio);
861 /* Sleep for 1 second before retrying */
866 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, ds_idx);
868 pgio->pg_mirror_idx = ds_idx;
870 /* read always uses only one mirror - idx 0 for pgio layer */
871 pgm = &pgio->pg_mirrors[0];
872 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
874 if (NFS_SERVER(pgio->pg_inode)->flags &
875 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
876 pgio->pg_maxretrans = io_maxretrans;
879 if (pgio->pg_error < 0)
882 trace_pnfs_mds_fallback_pg_init_read(pgio->pg_inode,
883 0, NFS4_MAX_UINT64, IOMODE_READ,
884 NFS_I(pgio->pg_inode)->layout,
886 pgio->pg_maxretrans = 0;
887 nfs_pageio_reset_read_mds(pgio);
891 ff_layout_pg_init_write(struct nfs_pageio_descriptor *pgio,
892 struct nfs_page *req)
894 struct nfs4_ff_layout_mirror *mirror;
895 struct nfs_pgio_mirror *pgm;
896 struct nfs4_pnfs_ds *ds;
900 ff_layout_pg_check_layout(pgio, req);
901 if (!pgio->pg_lseg) {
902 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
903 nfs_req_openctx(req),
909 if (IS_ERR(pgio->pg_lseg)) {
910 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
911 pgio->pg_lseg = NULL;
915 /* If no lseg, fall back to write through mds */
916 if (pgio->pg_lseg == NULL)
919 /* Use a direct mapping of ds_idx to pgio mirror_idx */
920 if (pgio->pg_mirror_count != FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg))
923 for (i = 0; i < pgio->pg_mirror_count; i++) {
924 mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
925 ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
927 if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
929 pnfs_generic_pg_cleanup(pgio);
930 /* Sleep for 1 second before retrying */
934 pgm = &pgio->pg_mirrors[i];
935 pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
938 if (NFS_SERVER(pgio->pg_inode)->flags &
939 (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR))
940 pgio->pg_maxretrans = io_maxretrans;
943 pnfs_generic_pg_cleanup(pgio);
944 pgio->pg_error = -EAGAIN;
947 trace_pnfs_mds_fallback_pg_init_write(pgio->pg_inode,
948 0, NFS4_MAX_UINT64, IOMODE_RW,
949 NFS_I(pgio->pg_inode)->layout,
951 pgio->pg_maxretrans = 0;
952 nfs_pageio_reset_write_mds(pgio);
953 pgio->pg_error = -EAGAIN;
957 ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
958 struct nfs_page *req)
960 if (!pgio->pg_lseg) {
961 pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
962 nfs_req_openctx(req),
968 if (IS_ERR(pgio->pg_lseg)) {
969 pgio->pg_error = PTR_ERR(pgio->pg_lseg);
970 pgio->pg_lseg = NULL;
975 return FF_LAYOUT_MIRROR_COUNT(pgio->pg_lseg);
977 trace_pnfs_mds_fallback_pg_get_mirror_count(pgio->pg_inode,
978 0, NFS4_MAX_UINT64, IOMODE_RW,
979 NFS_I(pgio->pg_inode)->layout,
981 /* no lseg means that pnfs is not in use, so no mirroring here */
982 nfs_pageio_reset_write_mds(pgio);
987 static const struct nfs_pageio_ops ff_layout_pg_read_ops = {
988 .pg_init = ff_layout_pg_init_read,
989 .pg_test = pnfs_generic_pg_test,
990 .pg_doio = pnfs_generic_pg_readpages,
991 .pg_cleanup = pnfs_generic_pg_cleanup,
994 static const struct nfs_pageio_ops ff_layout_pg_write_ops = {
995 .pg_init = ff_layout_pg_init_write,
996 .pg_test = pnfs_generic_pg_test,
997 .pg_doio = pnfs_generic_pg_writepages,
998 .pg_get_mirror_count = ff_layout_pg_get_mirror_count_write,
999 .pg_cleanup = pnfs_generic_pg_cleanup,
1002 static void ff_layout_reset_write(struct nfs_pgio_header *hdr, bool retry_pnfs)
1004 struct rpc_task *task = &hdr->task;
1006 pnfs_layoutcommit_inode(hdr->inode, false);
1009 dprintk("%s Reset task %5u for i/o through pNFS "
1010 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1012 hdr->inode->i_sb->s_id,
1013 (unsigned long long)NFS_FILEID(hdr->inode),
1015 (unsigned long long)hdr->args.offset);
1017 hdr->completion_ops->reschedule_io(hdr);
1021 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1022 dprintk("%s Reset task %5u for i/o through MDS "
1023 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1025 hdr->inode->i_sb->s_id,
1026 (unsigned long long)NFS_FILEID(hdr->inode),
1028 (unsigned long long)hdr->args.offset);
1030 trace_pnfs_mds_fallback_write_done(hdr->inode,
1031 hdr->args.offset, hdr->args.count,
1032 IOMODE_RW, NFS_I(hdr->inode)->layout,
1034 task->tk_status = pnfs_write_done_resend_to_mds(hdr);
1038 static void ff_layout_resend_pnfs_read(struct nfs_pgio_header *hdr)
1040 u32 idx = hdr->pgio_mirror_idx + 1;
1043 if (ff_layout_choose_any_ds_for_read(hdr->lseg, idx + 1, &new_idx))
1044 ff_layout_send_layouterror(hdr->lseg);
1046 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1047 pnfs_read_resend_pnfs(hdr, new_idx);
1050 static void ff_layout_reset_read(struct nfs_pgio_header *hdr)
1052 struct rpc_task *task = &hdr->task;
1054 pnfs_layoutcommit_inode(hdr->inode, false);
1055 pnfs_error_mark_layout_for_return(hdr->inode, hdr->lseg);
1057 if (!test_and_set_bit(NFS_IOHDR_REDO, &hdr->flags)) {
1058 dprintk("%s Reset task %5u for i/o through MDS "
1059 "(req %s/%llu, %u bytes @ offset %llu)\n", __func__,
1061 hdr->inode->i_sb->s_id,
1062 (unsigned long long)NFS_FILEID(hdr->inode),
1064 (unsigned long long)hdr->args.offset);
1066 trace_pnfs_mds_fallback_read_done(hdr->inode,
1067 hdr->args.offset, hdr->args.count,
1068 IOMODE_READ, NFS_I(hdr->inode)->layout,
1070 task->tk_status = pnfs_read_done_resend_to_mds(hdr);
1074 static int ff_layout_async_handle_error_v4(struct rpc_task *task,
1075 struct nfs4_state *state,
1076 struct nfs_client *clp,
1077 struct pnfs_layout_segment *lseg,
1080 struct pnfs_layout_hdr *lo = lseg->pls_layout;
1081 struct inode *inode = lo->plh_inode;
1082 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1083 struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
1085 switch (task->tk_status) {
1086 case -NFS4ERR_BADSESSION:
1087 case -NFS4ERR_BADSLOT:
1088 case -NFS4ERR_BAD_HIGH_SLOT:
1089 case -NFS4ERR_DEADSESSION:
1090 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1091 case -NFS4ERR_SEQ_FALSE_RETRY:
1092 case -NFS4ERR_SEQ_MISORDERED:
1093 dprintk("%s ERROR %d, Reset session. Exchangeid "
1094 "flags 0x%x\n", __func__, task->tk_status,
1095 clp->cl_exchange_flags);
1096 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
1098 case -NFS4ERR_DELAY:
1099 case -NFS4ERR_GRACE:
1100 rpc_delay(task, FF_LAYOUT_POLL_RETRY_MAX);
1102 case -NFS4ERR_RETRY_UNCACHED_REP:
1104 /* Invalidate Layout errors */
1105 case -NFS4ERR_PNFS_NO_LAYOUT:
1106 case -ESTALE: /* mapped NFS4ERR_STALE */
1107 case -EBADHANDLE: /* mapped NFS4ERR_BADHANDLE */
1108 case -EISDIR: /* mapped NFS4ERR_ISDIR */
1109 case -NFS4ERR_FHEXPIRED:
1110 case -NFS4ERR_WRONG_TYPE:
1111 dprintk("%s Invalid layout error %d\n", __func__,
1114 * Destroy layout so new i/o will get a new layout.
1115 * Layout will not be destroyed until all current lseg
1116 * references are put. Mark layout as invalid to resend failed
1117 * i/o and all i/o waiting on the slot table to the MDS until
1118 * layout is destroyed and a new valid layout is obtained.
1120 pnfs_destroy_layout(NFS_I(inode));
1121 rpc_wake_up(&tbl->slot_tbl_waitq);
1123 /* RPC connection errors */
1131 dprintk("%s DS connection error %d\n", __func__,
1133 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1135 rpc_wake_up(&tbl->slot_tbl_waitq);
1138 if (ff_layout_avoid_mds_available_ds(lseg))
1139 return -NFS4ERR_RESET_TO_PNFS;
1141 dprintk("%s Retry through MDS. Error %d\n", __func__,
1143 return -NFS4ERR_RESET_TO_MDS;
1145 task->tk_status = 0;
1149 /* Retry all errors through either pNFS or MDS except for -EJUKEBOX */
1150 static int ff_layout_async_handle_error_v3(struct rpc_task *task,
1151 struct pnfs_layout_segment *lseg,
1154 struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
1156 switch (task->tk_status) {
1157 /* File access problems. Don't mark the device as unavailable */
1166 nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
1169 dprintk("%s DS connection error %d\n", __func__,
1171 nfs4_delete_deviceid(devid->ld, devid->nfs_client,
1174 /* FIXME: Need to prevent infinite looping here. */
1175 return -NFS4ERR_RESET_TO_PNFS;
1177 task->tk_status = 0;
1178 rpc_restart_call_prepare(task);
1179 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
1183 static int ff_layout_async_handle_error(struct rpc_task *task,
1184 struct nfs4_state *state,
1185 struct nfs_client *clp,
1186 struct pnfs_layout_segment *lseg,
1189 int vers = clp->cl_nfs_mod->rpc_vers->number;
1191 if (task->tk_status >= 0) {
1192 ff_layout_mark_ds_reachable(lseg, idx);
1196 /* Handle the case of an invalid layout segment */
1197 if (!pnfs_is_valid_lseg(lseg))
1198 return -NFS4ERR_RESET_TO_PNFS;
1202 return ff_layout_async_handle_error_v3(task, lseg, idx);
1204 return ff_layout_async_handle_error_v4(task, state, clp,
1207 /* should never happen */
1213 static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
1214 int idx, u64 offset, u64 length,
1215 u32 *op_status, int opnum, int error)
1217 struct nfs4_ff_layout_mirror *mirror;
1218 u32 status = *op_status;
1225 case -EPROTONOSUPPORT:
1236 *op_status = status = NFS4ERR_NXIO;
1239 *op_status = status = NFS4ERR_ACCESS;
1246 mirror = FF_LAYOUT_COMP(lseg, idx);
1247 err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
1248 mirror, offset, length, status, opnum,
1256 ff_layout_mark_ds_unreachable(lseg, idx);
1258 * Don't return the layout if this is a read and we still
1259 * have layouts to try
1261 if (opnum == OP_READ)
1265 pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
1269 dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
1272 /* NFS_PROTO call done callback routines */
1273 static int ff_layout_read_done_cb(struct rpc_task *task,
1274 struct nfs_pgio_header *hdr)
1278 if (task->tk_status < 0) {
1279 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1280 hdr->args.offset, hdr->args.count,
1281 &hdr->res.op_status, OP_READ,
1283 trace_ff_layout_read_error(hdr);
1286 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1287 hdr->ds_clp, hdr->lseg,
1288 hdr->pgio_mirror_idx);
1290 trace_nfs4_pnfs_read(hdr, err);
1291 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1292 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1294 case -NFS4ERR_RESET_TO_PNFS:
1295 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1296 return task->tk_status;
1297 case -NFS4ERR_RESET_TO_MDS:
1298 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1299 return task->tk_status;
1306 rpc_restart_call_prepare(task);
1311 ff_layout_need_layoutcommit(struct pnfs_layout_segment *lseg)
1313 return !(FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_LAYOUTCOMMIT);
1317 * We reference the rpc_cred of the first WRITE that triggers the need for
1318 * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
1319 * rfc5661 is not clear about which credential should be used.
1321 * Flexlayout client should treat DS replied FILE_SYNC as DATA_SYNC, so
1322 * to follow http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
1323 * we always send layoutcommit after DS writes.
1326 ff_layout_set_layoutcommit(struct inode *inode,
1327 struct pnfs_layout_segment *lseg,
1330 if (!ff_layout_need_layoutcommit(lseg))
1333 pnfs_set_layoutcommit(inode, lseg, end_offset);
1334 dprintk("%s inode %lu pls_end_pos %llu\n", __func__, inode->i_ino,
1335 (unsigned long long) NFS_I(inode)->layout->plh_lwb);
1338 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
1339 struct nfs_pgio_header *hdr)
1341 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1343 nfs4_ff_layout_stat_io_start_read(hdr->inode,
1344 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1349 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
1350 struct nfs_pgio_header *hdr)
1352 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1354 nfs4_ff_layout_stat_io_end_read(task,
1355 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1358 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1361 static int ff_layout_read_prepare_common(struct rpc_task *task,
1362 struct nfs_pgio_header *hdr)
1364 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1365 rpc_exit(task, -EIO);
1369 ff_layout_read_record_layoutstats_start(task, hdr);
1374 * Call ops for the async read/write cases
1375 * In the case of dense layouts, the offset needs to be reset to its
1378 static void ff_layout_read_prepare_v3(struct rpc_task *task, void *data)
1380 struct nfs_pgio_header *hdr = data;
1382 if (ff_layout_read_prepare_common(task, hdr))
1385 rpc_call_start(task);
1388 static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
1390 struct nfs_pgio_header *hdr = data;
1392 if (nfs4_setup_sequence(hdr->ds_clp,
1393 &hdr->args.seq_args,
1398 ff_layout_read_prepare_common(task, hdr);
1401 static void ff_layout_read_call_done(struct rpc_task *task, void *data)
1403 struct nfs_pgio_header *hdr = data;
1405 dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
1407 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1408 task->tk_status == 0) {
1409 nfs4_sequence_done(task, &hdr->res.seq_res);
1413 /* Note this may cause RPC to be resent */
1414 hdr->mds_ops->rpc_call_done(task, hdr);
1417 static void ff_layout_read_count_stats(struct rpc_task *task, void *data)
1419 struct nfs_pgio_header *hdr = data;
1421 ff_layout_read_record_layoutstats_done(task, hdr);
1422 rpc_count_iostats_metrics(task,
1423 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_READ]);
1426 static void ff_layout_read_release(void *data)
1428 struct nfs_pgio_header *hdr = data;
1430 ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
1431 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
1432 ff_layout_resend_pnfs_read(hdr);
1433 else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1434 ff_layout_reset_read(hdr);
1435 pnfs_generic_rw_release(data);
1439 static int ff_layout_write_done_cb(struct rpc_task *task,
1440 struct nfs_pgio_header *hdr)
1442 loff_t end_offs = 0;
1445 if (task->tk_status < 0) {
1446 ff_layout_io_track_ds_error(hdr->lseg, hdr->pgio_mirror_idx,
1447 hdr->args.offset, hdr->args.count,
1448 &hdr->res.op_status, OP_WRITE,
1450 trace_ff_layout_write_error(hdr);
1453 err = ff_layout_async_handle_error(task, hdr->args.context->state,
1454 hdr->ds_clp, hdr->lseg,
1455 hdr->pgio_mirror_idx);
1457 trace_nfs4_pnfs_write(hdr, err);
1458 clear_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1459 clear_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1461 case -NFS4ERR_RESET_TO_PNFS:
1462 set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
1463 return task->tk_status;
1464 case -NFS4ERR_RESET_TO_MDS:
1465 set_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags);
1466 return task->tk_status;
1471 if (hdr->res.verf->committed == NFS_FILE_SYNC ||
1472 hdr->res.verf->committed == NFS_DATA_SYNC)
1473 end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
1475 /* Note: if the write is unstable, don't set end_offs until commit */
1476 ff_layout_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
1478 /* zero out fattr since we don't care DS attr at all */
1479 hdr->fattr.valid = 0;
1480 if (task->tk_status >= 0)
1481 nfs_writeback_update_inode(hdr);
1486 static int ff_layout_commit_done_cb(struct rpc_task *task,
1487 struct nfs_commit_data *data)
1491 if (task->tk_status < 0) {
1492 ff_layout_io_track_ds_error(data->lseg, data->ds_commit_index,
1493 data->args.offset, data->args.count,
1494 &data->res.op_status, OP_COMMIT,
1496 trace_ff_layout_commit_error(data);
1499 err = ff_layout_async_handle_error(task, NULL, data->ds_clp,
1500 data->lseg, data->ds_commit_index);
1502 trace_nfs4_pnfs_commit_ds(data, err);
1504 case -NFS4ERR_RESET_TO_PNFS:
1505 pnfs_generic_prepare_to_resend_writes(data);
1507 case -NFS4ERR_RESET_TO_MDS:
1508 pnfs_generic_prepare_to_resend_writes(data);
1511 rpc_restart_call_prepare(task);
1515 ff_layout_set_layoutcommit(data->inode, data->lseg, data->lwb);
1520 static void ff_layout_write_record_layoutstats_start(struct rpc_task *task,
1521 struct nfs_pgio_header *hdr)
1523 if (test_and_set_bit(NFS_IOHDR_STAT, &hdr->flags))
1525 nfs4_ff_layout_stat_io_start_write(hdr->inode,
1526 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1531 static void ff_layout_write_record_layoutstats_done(struct rpc_task *task,
1532 struct nfs_pgio_header *hdr)
1534 if (!test_and_clear_bit(NFS_IOHDR_STAT, &hdr->flags))
1536 nfs4_ff_layout_stat_io_end_write(task,
1537 FF_LAYOUT_COMP(hdr->lseg, hdr->pgio_mirror_idx),
1538 hdr->args.count, hdr->res.count,
1539 hdr->res.verf->committed);
1540 set_bit(NFS_LSEG_LAYOUTRETURN, &hdr->lseg->pls_flags);
1543 static int ff_layout_write_prepare_common(struct rpc_task *task,
1544 struct nfs_pgio_header *hdr)
1546 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) {
1547 rpc_exit(task, -EIO);
1551 ff_layout_write_record_layoutstats_start(task, hdr);
1555 static void ff_layout_write_prepare_v3(struct rpc_task *task, void *data)
1557 struct nfs_pgio_header *hdr = data;
1559 if (ff_layout_write_prepare_common(task, hdr))
1562 rpc_call_start(task);
1565 static void ff_layout_write_prepare_v4(struct rpc_task *task, void *data)
1567 struct nfs_pgio_header *hdr = data;
1569 if (nfs4_setup_sequence(hdr->ds_clp,
1570 &hdr->args.seq_args,
1575 ff_layout_write_prepare_common(task, hdr);
1578 static void ff_layout_write_call_done(struct rpc_task *task, void *data)
1580 struct nfs_pgio_header *hdr = data;
1582 if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
1583 task->tk_status == 0) {
1584 nfs4_sequence_done(task, &hdr->res.seq_res);
1588 /* Note this may cause RPC to be resent */
1589 hdr->mds_ops->rpc_call_done(task, hdr);
1592 static void ff_layout_write_count_stats(struct rpc_task *task, void *data)
1594 struct nfs_pgio_header *hdr = data;
1596 ff_layout_write_record_layoutstats_done(task, hdr);
1597 rpc_count_iostats_metrics(task,
1598 &NFS_CLIENT(hdr->inode)->cl_metrics[NFSPROC4_CLNT_WRITE]);
1601 static void ff_layout_write_release(void *data)
1603 struct nfs_pgio_header *hdr = data;
1605 ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
1606 if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
1607 ff_layout_send_layouterror(hdr->lseg);
1608 ff_layout_reset_write(hdr, true);
1609 } else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
1610 ff_layout_reset_write(hdr, false);
1611 pnfs_generic_rw_release(data);
1614 static void ff_layout_commit_record_layoutstats_start(struct rpc_task *task,
1615 struct nfs_commit_data *cdata)
1617 if (test_and_set_bit(NFS_IOHDR_STAT, &cdata->flags))
1619 nfs4_ff_layout_stat_io_start_write(cdata->inode,
1620 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1624 static void ff_layout_commit_record_layoutstats_done(struct rpc_task *task,
1625 struct nfs_commit_data *cdata)
1627 struct nfs_page *req;
1630 if (!test_and_clear_bit(NFS_IOHDR_STAT, &cdata->flags))
1633 if (task->tk_status == 0) {
1634 list_for_each_entry(req, &cdata->pages, wb_list)
1635 count += req->wb_bytes;
1637 nfs4_ff_layout_stat_io_end_write(task,
1638 FF_LAYOUT_COMP(cdata->lseg, cdata->ds_commit_index),
1639 count, count, NFS_FILE_SYNC);
1640 set_bit(NFS_LSEG_LAYOUTRETURN, &cdata->lseg->pls_flags);
1643 static void ff_layout_commit_prepare_common(struct rpc_task *task,
1644 struct nfs_commit_data *cdata)
1646 ff_layout_commit_record_layoutstats_start(task, cdata);
1649 static void ff_layout_commit_prepare_v3(struct rpc_task *task, void *data)
1651 ff_layout_commit_prepare_common(task, data);
1652 rpc_call_start(task);
1655 static void ff_layout_commit_prepare_v4(struct rpc_task *task, void *data)
1657 struct nfs_commit_data *wdata = data;
1659 if (nfs4_setup_sequence(wdata->ds_clp,
1660 &wdata->args.seq_args,
1661 &wdata->res.seq_res,
1664 ff_layout_commit_prepare_common(task, data);
1667 static void ff_layout_commit_done(struct rpc_task *task, void *data)
1669 pnfs_generic_write_commit_done(task, data);
1672 static void ff_layout_commit_count_stats(struct rpc_task *task, void *data)
1674 struct nfs_commit_data *cdata = data;
1676 ff_layout_commit_record_layoutstats_done(task, cdata);
1677 rpc_count_iostats_metrics(task,
1678 &NFS_CLIENT(cdata->inode)->cl_metrics[NFSPROC4_CLNT_COMMIT]);
1681 static void ff_layout_commit_release(void *data)
1683 struct nfs_commit_data *cdata = data;
1685 ff_layout_commit_record_layoutstats_done(&cdata->task, cdata);
1686 pnfs_generic_commit_release(data);
1689 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
1690 .rpc_call_prepare = ff_layout_read_prepare_v3,
1691 .rpc_call_done = ff_layout_read_call_done,
1692 .rpc_count_stats = ff_layout_read_count_stats,
1693 .rpc_release = ff_layout_read_release,
1696 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
1697 .rpc_call_prepare = ff_layout_read_prepare_v4,
1698 .rpc_call_done = ff_layout_read_call_done,
1699 .rpc_count_stats = ff_layout_read_count_stats,
1700 .rpc_release = ff_layout_read_release,
1703 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
1704 .rpc_call_prepare = ff_layout_write_prepare_v3,
1705 .rpc_call_done = ff_layout_write_call_done,
1706 .rpc_count_stats = ff_layout_write_count_stats,
1707 .rpc_release = ff_layout_write_release,
1710 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
1711 .rpc_call_prepare = ff_layout_write_prepare_v4,
1712 .rpc_call_done = ff_layout_write_call_done,
1713 .rpc_count_stats = ff_layout_write_count_stats,
1714 .rpc_release = ff_layout_write_release,
1717 static const struct rpc_call_ops ff_layout_commit_call_ops_v3 = {
1718 .rpc_call_prepare = ff_layout_commit_prepare_v3,
1719 .rpc_call_done = ff_layout_commit_done,
1720 .rpc_count_stats = ff_layout_commit_count_stats,
1721 .rpc_release = ff_layout_commit_release,
1724 static const struct rpc_call_ops ff_layout_commit_call_ops_v4 = {
1725 .rpc_call_prepare = ff_layout_commit_prepare_v4,
1726 .rpc_call_done = ff_layout_commit_done,
1727 .rpc_count_stats = ff_layout_commit_count_stats,
1728 .rpc_release = ff_layout_commit_release,
1731 static enum pnfs_try_status
1732 ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
1734 struct pnfs_layout_segment *lseg = hdr->lseg;
1735 struct nfs4_pnfs_ds *ds;
1736 struct rpc_clnt *ds_clnt;
1737 struct nfs4_ff_layout_mirror *mirror;
1738 const struct cred *ds_cred;
1739 loff_t offset = hdr->args.offset;
1740 u32 idx = hdr->pgio_mirror_idx;
1744 dprintk("--> %s ino %lu pgbase %u req %zu@%llu\n",
1745 __func__, hdr->inode->i_ino,
1746 hdr->args.pgbase, (size_t)hdr->args.count, offset);
1748 mirror = FF_LAYOUT_COMP(lseg, idx);
1749 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
1753 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1755 if (IS_ERR(ds_clnt))
1758 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1762 vers = nfs4_ff_layout_ds_version(mirror);
1764 dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
1765 ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
1767 hdr->pgio_done_cb = ff_layout_read_done_cb;
1768 refcount_inc(&ds->ds_clp->cl_count);
1769 hdr->ds_clp = ds->ds_clp;
1770 fh = nfs4_ff_layout_select_ds_fh(mirror);
1774 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1777 * Note that if we ever decide to split across DSes,
1778 * then we may need to handle dense-like offsets.
1780 hdr->args.offset = offset;
1781 hdr->mds_offset = offset;
1783 /* Perform an asynchronous read to ds */
1784 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1785 vers == 3 ? &ff_layout_read_call_ops_v3 :
1786 &ff_layout_read_call_ops_v4,
1787 0, RPC_TASK_SOFTCONN);
1789 return PNFS_ATTEMPTED;
1792 if (ff_layout_avoid_mds_available_ds(lseg))
1793 return PNFS_TRY_AGAIN;
1794 trace_pnfs_mds_fallback_read_pagelist(hdr->inode,
1795 hdr->args.offset, hdr->args.count,
1796 IOMODE_READ, NFS_I(hdr->inode)->layout, lseg);
1797 return PNFS_NOT_ATTEMPTED;
1800 /* Perform async writes. */
1801 static enum pnfs_try_status
1802 ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
1804 struct pnfs_layout_segment *lseg = hdr->lseg;
1805 struct nfs4_pnfs_ds *ds;
1806 struct rpc_clnt *ds_clnt;
1807 struct nfs4_ff_layout_mirror *mirror;
1808 const struct cred *ds_cred;
1809 loff_t offset = hdr->args.offset;
1812 int idx = hdr->pgio_mirror_idx;
1814 mirror = FF_LAYOUT_COMP(lseg, idx);
1815 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1819 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1821 if (IS_ERR(ds_clnt))
1824 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
1828 vers = nfs4_ff_layout_ds_version(mirror);
1830 dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
1831 __func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
1832 offset, ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count),
1835 hdr->pgio_done_cb = ff_layout_write_done_cb;
1836 refcount_inc(&ds->ds_clp->cl_count);
1837 hdr->ds_clp = ds->ds_clp;
1838 hdr->ds_commit_idx = idx;
1839 fh = nfs4_ff_layout_select_ds_fh(mirror);
1843 nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
1846 * Note that if we ever decide to split across DSes,
1847 * then we may need to handle dense-like offsets.
1849 hdr->args.offset = offset;
1851 /* Perform an asynchronous write */
1852 nfs_initiate_pgio(ds_clnt, hdr, ds_cred, ds->ds_clp->rpc_ops,
1853 vers == 3 ? &ff_layout_write_call_ops_v3 :
1854 &ff_layout_write_call_ops_v4,
1855 sync, RPC_TASK_SOFTCONN);
1857 return PNFS_ATTEMPTED;
1860 if (ff_layout_avoid_mds_available_ds(lseg))
1861 return PNFS_TRY_AGAIN;
1862 trace_pnfs_mds_fallback_write_pagelist(hdr->inode,
1863 hdr->args.offset, hdr->args.count,
1864 IOMODE_RW, NFS_I(hdr->inode)->layout, lseg);
1865 return PNFS_NOT_ATTEMPTED;
1868 static u32 calc_ds_index_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1873 static struct nfs_fh *
1874 select_ds_fh_from_commit(struct pnfs_layout_segment *lseg, u32 i)
1876 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1878 /* FIXME: Assume that there is only one NFS version available
1881 return &flseg->mirror_array[i]->fh_versions[0];
1884 static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
1886 struct pnfs_layout_segment *lseg = data->lseg;
1887 struct nfs4_pnfs_ds *ds;
1888 struct rpc_clnt *ds_clnt;
1889 struct nfs4_ff_layout_mirror *mirror;
1890 const struct cred *ds_cred;
1895 if (!lseg || !(pnfs_is_valid_lseg(lseg) ||
1896 test_bit(NFS_LSEG_LAYOUTRETURN, &lseg->pls_flags)))
1899 idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
1900 mirror = FF_LAYOUT_COMP(lseg, idx);
1901 ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
1905 ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
1907 if (IS_ERR(ds_clnt))
1910 ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
1914 vers = nfs4_ff_layout_ds_version(mirror);
1916 dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
1917 data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
1919 data->commit_done_cb = ff_layout_commit_done_cb;
1920 data->cred = ds_cred;
1921 refcount_inc(&ds->ds_clp->cl_count);
1922 data->ds_clp = ds->ds_clp;
1923 fh = select_ds_fh_from_commit(lseg, data->ds_commit_index);
1927 ret = nfs_initiate_commit(ds_clnt, data, ds->ds_clp->rpc_ops,
1928 vers == 3 ? &ff_layout_commit_call_ops_v3 :
1929 &ff_layout_commit_call_ops_v4,
1930 how, RPC_TASK_SOFTCONN);
1934 pnfs_generic_prepare_to_resend_writes(data);
1935 pnfs_generic_commit_release(data);
1940 ff_layout_commit_pagelist(struct inode *inode, struct list_head *mds_pages,
1941 int how, struct nfs_commit_info *cinfo)
1943 return pnfs_generic_commit_pagelist(inode, mds_pages, how, cinfo,
1944 ff_layout_initiate_commit);
1947 static struct pnfs_ds_commit_info *
1948 ff_layout_get_ds_info(struct inode *inode)
1950 struct pnfs_layout_hdr *layout = NFS_I(inode)->layout;
1955 return &FF_LAYOUT_FROM_HDR(layout)->commit_info;
1959 ff_layout_setup_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1960 struct pnfs_layout_segment *lseg)
1962 struct nfs4_ff_layout_segment *flseg = FF_LAYOUT_LSEG(lseg);
1963 struct inode *inode = lseg->pls_layout->plh_inode;
1964 struct pnfs_commit_array *array, *new;
1966 new = pnfs_alloc_commit_array(flseg->mirror_array_cnt, GFP_NOIO);
1968 spin_lock(&inode->i_lock);
1969 array = pnfs_add_commit_array(fl_cinfo, new, lseg);
1970 spin_unlock(&inode->i_lock);
1972 pnfs_free_commit_array(new);
1977 ff_layout_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo,
1978 struct inode *inode)
1980 spin_lock(&inode->i_lock);
1981 pnfs_generic_ds_cinfo_destroy(fl_cinfo);
1982 spin_unlock(&inode->i_lock);
1986 ff_layout_free_deviceid_node(struct nfs4_deviceid_node *d)
1988 nfs4_ff_layout_free_deviceid(container_of(d, struct nfs4_ff_layout_ds,
1992 static int ff_layout_encode_ioerr(struct xdr_stream *xdr,
1993 const struct nfs4_layoutreturn_args *args,
1994 const struct nfs4_flexfile_layoutreturn_args *ff_args)
1998 start = xdr_reserve_space(xdr, 4);
1999 if (unlikely(!start))
2002 *start = cpu_to_be32(ff_args->num_errors);
2003 /* This assume we always return _ALL_ layouts */
2004 return ff_layout_encode_ds_ioerr(xdr, &ff_args->errors);
2008 encode_opaque_fixed(struct xdr_stream *xdr, const void *buf, size_t len)
2010 WARN_ON_ONCE(xdr_stream_encode_opaque_fixed(xdr, buf, len) < 0);
2014 ff_layout_encode_ff_iostat_head(struct xdr_stream *xdr,
2015 const nfs4_stateid *stateid,
2016 const struct nfs42_layoutstat_devinfo *devinfo)
2020 p = xdr_reserve_space(xdr, 8 + 8);
2021 p = xdr_encode_hyper(p, devinfo->offset);
2022 p = xdr_encode_hyper(p, devinfo->length);
2023 encode_opaque_fixed(xdr, stateid->data, NFS4_STATEID_SIZE);
2024 p = xdr_reserve_space(xdr, 4*8);
2025 p = xdr_encode_hyper(p, devinfo->read_count);
2026 p = xdr_encode_hyper(p, devinfo->read_bytes);
2027 p = xdr_encode_hyper(p, devinfo->write_count);
2028 p = xdr_encode_hyper(p, devinfo->write_bytes);
2029 encode_opaque_fixed(xdr, devinfo->dev_id.data, NFS4_DEVICEID4_SIZE);
2033 ff_layout_encode_ff_iostat(struct xdr_stream *xdr,
2034 const nfs4_stateid *stateid,
2035 const struct nfs42_layoutstat_devinfo *devinfo)
2037 ff_layout_encode_ff_iostat_head(xdr, stateid, devinfo);
2038 ff_layout_encode_ff_layoutupdate(xdr, devinfo,
2039 devinfo->ld_private.data);
2042 /* report nothing for now */
2043 static void ff_layout_encode_iostats_array(struct xdr_stream *xdr,
2044 const struct nfs4_layoutreturn_args *args,
2045 struct nfs4_flexfile_layoutreturn_args *ff_args)
2050 p = xdr_reserve_space(xdr, 4);
2051 *p = cpu_to_be32(ff_args->num_dev);
2052 for (i = 0; i < ff_args->num_dev; i++)
2053 ff_layout_encode_ff_iostat(xdr,
2054 &args->layout->plh_stateid,
2055 &ff_args->devinfo[i]);
2059 ff_layout_free_iostats_array(struct nfs42_layoutstat_devinfo *devinfo,
2060 unsigned int num_entries)
2064 for (i = 0; i < num_entries; i++) {
2065 if (!devinfo[i].ld_private.ops)
2067 if (!devinfo[i].ld_private.ops->free)
2069 devinfo[i].ld_private.ops->free(&devinfo[i].ld_private);
2073 static struct nfs4_deviceid_node *
2074 ff_layout_alloc_deviceid_node(struct nfs_server *server,
2075 struct pnfs_device *pdev, gfp_t gfp_flags)
2077 struct nfs4_ff_layout_ds *dsaddr;
2079 dsaddr = nfs4_ff_alloc_deviceid_node(server, pdev, gfp_flags);
2082 return &dsaddr->id_node;
2086 ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
2087 const void *voidargs,
2088 const struct nfs4_xdr_opaque_data *ff_opaque)
2090 const struct nfs4_layoutreturn_args *args = voidargs;
2091 struct nfs4_flexfile_layoutreturn_args *ff_args = ff_opaque->data;
2092 struct xdr_buf tmp_buf = {
2095 .iov_base = page_address(ff_args->pages[0]),
2098 .buflen = PAGE_SIZE,
2100 struct xdr_stream tmp_xdr;
2103 dprintk("%s: Begin\n", __func__);
2105 xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
2107 ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
2108 ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
2110 start = xdr_reserve_space(xdr, 4);
2111 *start = cpu_to_be32(tmp_buf.len);
2112 xdr_write_pages(xdr, ff_args->pages, 0, tmp_buf.len);
2114 dprintk("%s: Return\n", __func__);
2118 ff_layout_free_layoutreturn(struct nfs4_xdr_opaque_data *args)
2120 struct nfs4_flexfile_layoutreturn_args *ff_args;
2124 ff_args = args->data;
2127 ff_layout_free_ds_ioerr(&ff_args->errors);
2128 ff_layout_free_iostats_array(ff_args->devinfo, ff_args->num_dev);
2130 put_page(ff_args->pages[0]);
2134 static const struct nfs4_xdr_opaque_ops layoutreturn_ops = {
2135 .encode = ff_layout_encode_layoutreturn,
2136 .free = ff_layout_free_layoutreturn,
2140 ff_layout_prepare_layoutreturn(struct nfs4_layoutreturn_args *args)
2142 struct nfs4_flexfile_layoutreturn_args *ff_args;
2143 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(args->layout);
2145 ff_args = kmalloc(sizeof(*ff_args), GFP_KERNEL);
2148 ff_args->pages[0] = alloc_page(GFP_KERNEL);
2149 if (!ff_args->pages[0])
2150 goto out_nomem_free;
2152 INIT_LIST_HEAD(&ff_args->errors);
2153 ff_args->num_errors = ff_layout_fetch_ds_ioerr(args->layout,
2154 &args->range, &ff_args->errors,
2155 FF_LAYOUTRETURN_MAXERR);
2157 spin_lock(&args->inode->i_lock);
2158 ff_args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2159 &ff_args->devinfo[0], ARRAY_SIZE(ff_args->devinfo));
2160 spin_unlock(&args->inode->i_lock);
2162 args->ld_private->ops = &layoutreturn_ops;
2163 args->ld_private->data = ff_args;
2171 #ifdef CONFIG_NFS_V4_2
2173 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2175 struct pnfs_layout_hdr *lo = lseg->pls_layout;
2176 struct nfs42_layout_error *errors;
2179 if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
2181 ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
2182 if (list_empty(&head))
2185 errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
2186 sizeof(*errors), GFP_NOFS);
2187 if (errors != NULL) {
2188 const struct nfs4_ff_layout_ds_err *pos;
2191 list_for_each_entry(pos, &head, list) {
2192 errors[n].offset = pos->offset;
2193 errors[n].length = pos->length;
2194 nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
2195 errors[n].errors[0].dev_id = pos->deviceid;
2196 errors[n].errors[0].status = pos->status;
2197 errors[n].errors[0].opnum = pos->opnum;
2199 if (!list_is_last(&pos->list, &head) &&
2200 n < NFS42_LAYOUTERROR_MAX)
2202 if (nfs42_proc_layouterror(lseg, errors, n) < 0)
2208 ff_layout_free_ds_ioerr(&head);
2212 ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
2218 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
2220 const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
2222 return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
2226 ff_layout_ntop6_noscopeid(const struct sockaddr *sap, char *buf,
2229 const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
2230 const struct in6_addr *addr = &sin6->sin6_addr;
2233 * RFC 4291, Section 2.2.2
2235 * Shorthanded ANY address
2237 if (ipv6_addr_any(addr))
2238 return snprintf(buf, buflen, "::");
2241 * RFC 4291, Section 2.2.2
2243 * Shorthanded loopback address
2245 if (ipv6_addr_loopback(addr))
2246 return snprintf(buf, buflen, "::1");
2249 * RFC 4291, Section 2.2.3
2251 * Special presentation address format for mapped v4
2254 if (ipv6_addr_v4mapped(addr))
2255 return snprintf(buf, buflen, "::ffff:%pI4",
2256 &addr->s6_addr32[3]);
2259 * RFC 4291, Section 2.2.1
2261 return snprintf(buf, buflen, "%pI6c", addr);
2264 /* Derived from rpc_sockaddr2uaddr */
2266 ff_layout_encode_netaddr(struct xdr_stream *xdr, struct nfs4_pnfs_ds_addr *da)
2268 struct sockaddr *sap = (struct sockaddr *)&da->da_addr;
2269 char portbuf[RPCBIND_MAXUADDRPLEN];
2270 char addrbuf[RPCBIND_MAXUADDRLEN];
2272 unsigned short port;
2276 switch (sap->sa_family) {
2278 if (ff_layout_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
2280 port = ntohs(((struct sockaddr_in *)sap)->sin_port);
2285 if (ff_layout_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
2287 port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
2292 /* we only support tcp and tcp6 */
2297 snprintf(portbuf, sizeof(portbuf), ".%u.%u", port >> 8, port & 0xff);
2298 len = strlcat(addrbuf, portbuf, sizeof(addrbuf));
2300 p = xdr_reserve_space(xdr, 4 + netid_len);
2301 xdr_encode_opaque(p, netid, netid_len);
2303 p = xdr_reserve_space(xdr, 4 + len);
2304 xdr_encode_opaque(p, addrbuf, len);
2308 ff_layout_encode_nfstime(struct xdr_stream *xdr,
2311 struct timespec64 ts;
2314 p = xdr_reserve_space(xdr, 12);
2315 ts = ktime_to_timespec64(t);
2316 p = xdr_encode_hyper(p, ts.tv_sec);
2317 *p++ = cpu_to_be32(ts.tv_nsec);
2321 ff_layout_encode_io_latency(struct xdr_stream *xdr,
2322 struct nfs4_ff_io_stat *stat)
2326 p = xdr_reserve_space(xdr, 5 * 8);
2327 p = xdr_encode_hyper(p, stat->ops_requested);
2328 p = xdr_encode_hyper(p, stat->bytes_requested);
2329 p = xdr_encode_hyper(p, stat->ops_completed);
2330 p = xdr_encode_hyper(p, stat->bytes_completed);
2331 p = xdr_encode_hyper(p, stat->bytes_not_delivered);
2332 ff_layout_encode_nfstime(xdr, stat->total_busy_time);
2333 ff_layout_encode_nfstime(xdr, stat->aggregate_completion_time);
2337 ff_layout_encode_ff_layoutupdate(struct xdr_stream *xdr,
2338 const struct nfs42_layoutstat_devinfo *devinfo,
2339 struct nfs4_ff_layout_mirror *mirror)
2341 struct nfs4_pnfs_ds_addr *da;
2342 struct nfs4_pnfs_ds *ds = mirror->mirror_ds->ds;
2343 struct nfs_fh *fh = &mirror->fh_versions[0];
2346 da = list_first_entry(&ds->ds_addrs, struct nfs4_pnfs_ds_addr, da_node);
2347 dprintk("%s: DS %s: encoding address %s\n",
2348 __func__, ds->ds_remotestr, da->da_remotestr);
2350 ff_layout_encode_netaddr(xdr, da);
2352 p = xdr_reserve_space(xdr, 4 + fh->size);
2353 xdr_encode_opaque(p, fh->data, fh->size);
2354 /* ff_io_latency4 read */
2355 spin_lock(&mirror->lock);
2356 ff_layout_encode_io_latency(xdr, &mirror->read_stat.io_stat);
2357 /* ff_io_latency4 write */
2358 ff_layout_encode_io_latency(xdr, &mirror->write_stat.io_stat);
2359 spin_unlock(&mirror->lock);
2361 ff_layout_encode_nfstime(xdr, ktime_sub(ktime_get(), mirror->start_time));
2363 p = xdr_reserve_space(xdr, 4);
2364 *p = cpu_to_be32(false);
2368 ff_layout_encode_layoutstats(struct xdr_stream *xdr, const void *args,
2369 const struct nfs4_xdr_opaque_data *opaque)
2371 struct nfs42_layoutstat_devinfo *devinfo = container_of(opaque,
2372 struct nfs42_layoutstat_devinfo, ld_private);
2375 /* layoutupdate length */
2376 start = xdr_reserve_space(xdr, 4);
2377 ff_layout_encode_ff_layoutupdate(xdr, devinfo, opaque->data);
2379 *start = cpu_to_be32((xdr->p - start - 1) * 4);
2383 ff_layout_free_layoutstats(struct nfs4_xdr_opaque_data *opaque)
2385 struct nfs4_ff_layout_mirror *mirror = opaque->data;
2387 ff_layout_put_mirror(mirror);
2390 static const struct nfs4_xdr_opaque_ops layoutstat_ops = {
2391 .encode = ff_layout_encode_layoutstats,
2392 .free = ff_layout_free_layoutstats,
2396 ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
2397 struct nfs42_layoutstat_devinfo *devinfo,
2400 struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);
2401 struct nfs4_ff_layout_mirror *mirror;
2402 struct nfs4_deviceid_node *dev;
2405 list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
2408 if (IS_ERR_OR_NULL(mirror->mirror_ds))
2410 if (!test_and_clear_bit(NFS4_FF_MIRROR_STAT_AVAIL, &mirror->flags))
2412 /* mirror refcount put in cleanup_layoutstats */
2413 if (!refcount_inc_not_zero(&mirror->ref))
2415 dev = &mirror->mirror_ds->id_node;
2416 memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);
2417 devinfo->offset = 0;
2418 devinfo->length = NFS4_MAX_UINT64;
2419 spin_lock(&mirror->lock);
2420 devinfo->read_count = mirror->read_stat.io_stat.ops_completed;
2421 devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;
2422 devinfo->write_count = mirror->write_stat.io_stat.ops_completed;
2423 devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;
2424 spin_unlock(&mirror->lock);
2425 devinfo->layout_type = LAYOUT_FLEX_FILES;
2426 devinfo->ld_private.ops = &layoutstat_ops;
2427 devinfo->ld_private.data = mirror;
2436 ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
2438 struct nfs4_flexfile_layout *ff_layout;
2439 const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;
2441 /* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */
2442 args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);
2446 spin_lock(&args->inode->i_lock);
2447 ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);
2448 args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,
2449 &args->devinfo[0], dev_count);
2450 spin_unlock(&args->inode->i_lock);
2451 if (!args->num_dev) {
2452 kfree(args->devinfo);
2453 args->devinfo = NULL;
2461 ff_layout_set_layoutdriver(struct nfs_server *server,
2462 const struct nfs_fh *dummy)
2464 #if IS_ENABLED(CONFIG_NFS_V4_2)
2465 server->caps |= NFS_CAP_LAYOUTSTATS;
2470 static const struct pnfs_commit_ops ff_layout_commit_ops = {
2471 .setup_ds_info = ff_layout_setup_ds_info,
2472 .release_ds_info = ff_layout_release_ds_info,
2473 .mark_request_commit = pnfs_layout_mark_request_commit,
2474 .clear_request_commit = pnfs_generic_clear_request_commit,
2475 .scan_commit_lists = pnfs_generic_scan_commit_lists,
2476 .recover_commit_reqs = pnfs_generic_recover_commit_reqs,
2477 .commit_pagelist = ff_layout_commit_pagelist,
2480 static struct pnfs_layoutdriver_type flexfilelayout_type = {
2481 .id = LAYOUT_FLEX_FILES,
2482 .name = "LAYOUT_FLEX_FILES",
2483 .owner = THIS_MODULE,
2484 .flags = PNFS_LAYOUTGET_ON_OPEN,
2485 .max_layoutget_response = 4096, /* 1 page or so... */
2486 .set_layoutdriver = ff_layout_set_layoutdriver,
2487 .alloc_layout_hdr = ff_layout_alloc_layout_hdr,
2488 .free_layout_hdr = ff_layout_free_layout_hdr,
2489 .alloc_lseg = ff_layout_alloc_lseg,
2490 .free_lseg = ff_layout_free_lseg,
2491 .add_lseg = ff_layout_add_lseg,
2492 .pg_read_ops = &ff_layout_pg_read_ops,
2493 .pg_write_ops = &ff_layout_pg_write_ops,
2494 .get_ds_info = ff_layout_get_ds_info,
2495 .free_deviceid_node = ff_layout_free_deviceid_node,
2496 .read_pagelist = ff_layout_read_pagelist,
2497 .write_pagelist = ff_layout_write_pagelist,
2498 .alloc_deviceid_node = ff_layout_alloc_deviceid_node,
2499 .prepare_layoutreturn = ff_layout_prepare_layoutreturn,
2500 .sync = pnfs_nfs_generic_sync,
2501 .prepare_layoutstats = ff_layout_prepare_layoutstats,
2504 static int __init nfs4flexfilelayout_init(void)
2506 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Registering...\n",
2508 return pnfs_register_layoutdriver(&flexfilelayout_type);
2511 static void __exit nfs4flexfilelayout_exit(void)
2513 printk(KERN_INFO "%s: NFSv4 Flexfile Layout Driver Unregistering...\n",
2515 pnfs_unregister_layoutdriver(&flexfilelayout_type);
2518 MODULE_ALIAS("nfs-layouttype4-4");
2520 MODULE_LICENSE("GPL");
2521 MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
2523 module_init(nfs4flexfilelayout_init);
2524 module_exit(nfs4flexfilelayout_exit);
2526 module_param(io_maxretrans, ushort, 0644);
2527 MODULE_PARM_DESC(io_maxretrans, "The number of times the NFSv4.1 client "
2528 "retries an I/O request before returning an error. ");